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wet scrubbers

wet scrubbers

wet scrubbers

(OP)

where can I find design guides and selection manuals on wet scrubbers?

RE: wet scrubbers

What are you trying to remove?  NOx, SOx, particles?

RE: wet scrubbers

(OP)
Elguero

I want to remove the HNO3 and NOx

thks

RE: wet scrubbers

Mechanicaldup

Scrubbing depends upon solubilty of gas in the media.

NOx (five or seven gasses) can not be scrubbed - it requires a form of 'black magic'.

What are the concentrations? and what are you hoping to reduce to? NOx is still coloured even at low concentrations.

Regards

Ed

Ed Clymer
Resinfab & Associates
England

RE: wet scrubbers

HNO3 (that is, nitric acid) can be removed by scrubbing with a high pH water solution.

Many NOx compounds can be decomposed via catalytic converter.  Some NOx can be converted to HNO3.  Elevating the pressure, via a compressor, can boost solubility in water – this makes neutralization in high pH water easier.

More specifics are needed.

RE: wet scrubbers


In some cases, the NOx can be eliminated at the source.  If formed from the HNO3, as when used for stripping plating, add a bit of H2O2 to the nitric stripping solution.  The H2O2 catalyzes the reaction of NOx back to HNO3 before it ever leaves the solution.  This conserves HNO3 as well as eliminates the NOx.  

Only 0.1-0.2 vol% H2O2 (49 wt%) is required for heavy stripping; e.g., when using 50 vol% nitric on electroless nickel plated out on an SS HXer.  Works well at ambient temperature; at some higher temperature the H2O2 will decompose too rapidly to be practical.  

Of course, this tip is for end-users, not equipment manufacturers.  If the latter, you could perhaps earn some customer good-will with this tip.  It's not generally known; I've met EN platers with 15 & 20 years experience who were really grateful to get rid of the red-orange fumes.

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